Priapism of ambiguous classification in a sickle cell patient.

We report a case of recurrent priapism in a sickle cell patient who had undergone physiological transformation from a low-flow state to a mixed high-flow/low-flow picture. An oral alpha-adrenergic agonist/histamine-1 antagonist combination maintained a balance of potency without stutter in the latter state, whereas an oral alpha-adrenergic agonist in the early part of his course did not prevent priapic progression. Concomitant use of a non-steroidal anti-androgenic agent rendered him impotent despite good libido. Other etiologies should be considered in the setting of recurrent priapism and failed standard therapies; duplex ultrasound is useful in order to delineate the hemodynamics. This case supports contentions that priapism is a spectrum phenomenon, and raises questions regarding the mechanism by which alpha-adrenergic agents prevent priapic progression.